Mentor doesn't guess the language from what you type. It uses your browser's language, or the one you set under Settings, Reply language, and keeps to it.
What it does
By default Mentor replies in your browser's language. Under Settings, Reply language, you can fix one language instead.
Every reply then comes back in that language until you change the setting.
Why
A reply that switches language because you pasted a line in another one is a surprise. You choose the language once.
What it won't do
- It doesn't detect a language from your message.
- It doesn't change language partway through a conversation.
How to use it
Open the Mentor guide in your dashboard, or start a trial to try it.